Elevator drop bar



A. HUBER ELEVATOR DROP BAR July 6,1926. "591,385

Filed March 2. 1925 -2 Sheets-sheet 2 F1' Gly Fla z2. 5 f* 26 Z5/f F az5k y //N l5 2 I/ ,4f v /6/ v n I 6 Y. zo/ 1 v lfyyenfor ADOLPH Hum PafndJu'lyis, 1926.

prlicwon'ifiledinwh 2, swarm-42 vthe diclgslureslher'ein given. In" the,V dnawings wherein like reference? will be obvious'fo.thosskilldf `inifhela'ift .l

olf-.them

bar. f.

@ridi 30 vfastened on the rod bye means of a cotter 31 movable tovarious adjustable positions longitudinally thereof through one of Atrip lever 2 is pivoted at one end some stationary' part -of the doorstructure,`V

a series of openings 31.M The' upperendV as the part- 29, and extendsthrough the cam 34 on the member 1, as shown, the freer endY of thelever projectingy into the elevator shaft or opening for a purpose to bedei or rollers?) may be iXedone at either side scribed shortly. A roller2 is. preferably journalledl in the free end of thexlever. A plate tispreferably arranged spacedfrom the lcooperating surface of the member 1and fixed thereto/t0 `provide a guide and retainer for the lever whereitv passes through s aiclineinber. Two hardened pins of the`V lever,between the vplate 5 and the cooperating surface of the memberl, asshown. Y j

A pair of double `beveled cam members 22-22 are mounted upon oneoftheforward:

uprights 27 of the elevator cage,'moving Y therewith inthe path of thetrip lever, and' tripping Ythe latterWvheneverhthe'free end of the leverprojects into the path of movement of the members 22-22 fixed to theelevator. As thefree endof the drop-bar is released from its wedgedlatching position at the bottom of the slot, and swung'upwardly to Openposition againstthe vertical wall of the doorway leadingto theV'elevator shaft,

rsuch movement will first lift therod'r' -upwardly until the spring 8begins tocompress, the latter'then transmittingA the movement to theslidable member 1, the latter actuating the trip lever to substantiallyhori- Zontal position with thefree end of the samev extendinginto theVpath of vertical travel of the members 22422. lnk order toA maintain thebar in its open position, a latching device is arranged'at the free endvof the bar, said latch beingindicated by the nuwill act in sequence inthe following way.-

ineral 23,'andradapted tocooperate with the other mating part 23attached to a fixed structure, as the upright 29. j

Als the' velevator' moves away verticallyv from its stopped position-atiioor levehone of the members 22, depending Vupon whichV direction theelevator is' traveling, trips the lever 2, moving the latter and thememberV 1 therewith in one direction orth'e other, to cause the' cam 34carried by said vslidable meniber t0 slide against the roller21-vmount;ed rintermediate the ends. {0f .the drop-bar" V- f The necessaryandpres's the drop-bar out of its latched engagement with the latch 23.A spring 28 is arranged adjacent the pivoted end of the drop-bar,thesame being placed under pressure by the drop-bar when opening thesame,

and exerting its pressure to shove the dr'opbar slightly, as soon as thebar has been tripped and released frointhe engagement at the latch 23.

upward or downwardV movementv ofthe slidable member when releasing thelatch 23 does not cause av corresponding -movement of the 'rod '17,inasmuch as there is su'liicient longitudinal play or yieldtherebetween, as shown( lt is apparent that Vunless some means were providedto take up the shock of the free fall ofthe drop-bar, said barwould malte an undue amount of noise'and quickly Y wear out and shatterto pieces. There is a link 14 pivoted at one end V to the hinged end.connected to the upper end of a vertically slidable rod 15. GuidesV20-20 are` arranged on the post 18, adjacent the ends'of the rod, yand acoil spring 16V encircles'the rod between the guides, one end of thespring.

'being free and the otherend bearing against an adjustably nXed washeror key 17 or the like, the latter being insertable through one of aseries of'holes 17. Y Y Y The spring 16 will therefore act as a shockabsorber and retard the speed ofV falling Aof the drop-bar in thewell-known manner, the

`spring expanding or velongating when the drop-bar is openedV and Abeingcompressed when the bar is dropped. By adjusting the washers oft thesprings 8Y andv 16l variousl amounts of play and degrees of compressionmay be obtained, thus compensating for wearlbetween the parts. v

ln additionto this shock-absorbing and speed-retarding means, `they-free-end of the drop-barv is actedon by independent speedretarding means,the samercomprising the lfrictional wedgmg ofthe bar 1n the taperedlguideway as the bar drops-toward the bot- Atom of the slot, the freeendof the bar being locked in normal closed position by the y spring-barat the end of movement of the vdrop-bar inthe bottom of the slot.

rlhe plurality of spe'ed-retarding means During the first lpart of thefall, the spring V16 will do the retarding, andas soon as the-Abarenters the tapered slot the'frictionalor `wedging action will occur,both ofthese 1 n rdependent means working 1n unison thence to the end offall of the drop-bar.

From the 4foregoing description it will be seen that I have providedy adrop-bar whichr may be manually raised from itsnormallylatchedhorizontal position, to open position,' and .soon vas theelevatormoves away from f message? the? floor le'if'el,g 1the fn'iovementf'liv-ill hause the baz-rf to' fall with fretardedA movement" to its.Vv`normally".latched;closedfposition! Illieli'shock` ofEv alfli'ng,t.`heAWear oi'f' thepafrts, and shaft-' tering `willbei'-'reil'wxfed,g-antlit-heinoise Will: be`lr f.,greatlyminimized`v v All of theparts aremade' `ofstro-rrgl and durable, material, making a'device Jivhieh. 1

' Qin'entotfsaid Vl 'e,vatorfftofrelease s shall be neat and;attractivein appearance and will last fora-:long period 'ottime Without'j attention'Vl other.- Ithan an occ'a'simalz oilrngff.

All I' ropes, which deteriorate `rapidly have been' .dispensed with",and lhencel 'the oost of upkeep is greatlyreduced; f' l;

Having: thus describedmy .invention;` itf isi Y parting fromthewspir-itl'off invention hence Il vc ltinotniv'is,iii-toghe limitedtothe vexact `Vform, construction, arrangement and combii; In adevice-Of unkind deseribedand in combination, an elevator drop-bar,mecha' nismadapted to be'operated by the movement of the elevatortoengage said bar inV its open position to actuate said bar to itsclosed position, and f Ameans for frictionally retarding said closingmovement of said bar.

' .Y 2. In a device of the kind described andV in c'omblnatiomanelevator vdrop-bar, means operable by the elevator to release saiddrop-V bar from its open position, andav plurality i or' means operableVin sequence'to resiliently and friction'ally retard the fallingmovement* of said bar'to its closedy position.

.3. In a vdevice of Vthe kind described and in combination," an elevatordropebar mov- 1 able to open or closed position, means operableautomatically by the elevator to release said bar from its openposition, means inde- Y pendent of said first-mentioned means and ci' iYeo cooperable'ivith said bar after saidireleaseV and actuating said bartoward its closed position, and means to retard theV free fall or Saidbar to its closed position." y Y f Ll. In a device of the kind describedand in combinatioman elevator drop-bar adaptg ed to be manually raisedtoits openposition,

a latch holding Vsaid bar inl itsnormally closed position, a' secondlatch holding said bar in its open position, and a plurality or" meanscooperable r`-with saidbar toxrele'ase it from engagementivith saidsecond-named latch to cause the bar'to fall toward its closed position,and resiliently and rictionally'retarding the fall of the bar to itsclosed,"

latched position.

in combination, an elevator drop-bar hingedk j at'one end and'adapted tobe swung .toits ,open position and automatically held there-V after,mechanism operable by the movement V,of ,the i elevator lfor.automatically dropping;

for frictionallyjretarding thev 'closingfmovesi .y ment ofsaidH-bar.`r`Y 'i6'. In'a devicejof'the 'kind describje'dand incornb'ination withan1eleI-v`ator, an elevator drop-baradapted tobe 'latched open' pol"siti on, mechanism controlled t ie movemeansV jresilie"` 'tly pressing1vrsaid :ba towardy its 1 closed fpositiom'f said#meansE bei di latch, l

and :l'atehed' thereat, rneans4 operable vvupon release of said .latchtostart said bar toward l" its closed position, and av pluraltyof meansoperable 'in sequence to yieldingly and fric-g, tionally retard VVthe',closing movement lof said bar.` Y f f 8. In a device of the kinddescribed and in combination with an elevator,` a :pivotedAv drop-baradaptedtobe manually moved to open position and held thereat, mechanismf controlled by thefmovementof said elevator in either direction to-release said bar, means operable When said bar is in 4open position forengaging with and pressing said barfto-A `Ward closed position, andmeans :for retard# .ally retard theffalling` movement offsaid incombination, an elevator drop-bar adapt- .Y L i ll() ed to be manuallyraised to openpositioma trip adapted to be set by `said opening movementot' ysaid bar-and operably con neoted'to said bar with ayieldableconned,

tion. therebetween, and a.. longitudinally yieldable member connected tosaid barto resiliently counteract the closing movement thereof'.

'"llpln a device of the'kind described and in combination, an elevatordrop-bar .adaptf ed to 'be' manually raised to 'open'. position ico andlatched thereat, andrneans adapted to-"f lvator andcooperablevvitlisaidbarto control the falling, closing movement thereof,

x 1 .said Vmeans .comprisinga cam engageable y5. In a device of thekinddescribed andH Abe controlled by the movement of lthe elel Witlrsaidbar,fa'is'lidablejmember carrying saidcam', a resiliently yieldableconnection between 'said bar vand memberv and Vtransmitiso i cam torelease said latch, said lever' being in the patli of movement of saidelevator only when the bar is in its open position, means engaging withlthe bar in its raised position `to `shove the bar toward its closedposition after the :bar lias been released from its latclied ope-nposition, and inea-ns for retarding the closing movement of said bar.

l2. In a device of tliekind described and in combination, anelevatordrop-bar pivoted at one Yendl and adapted to be manually swungV.upwardly to open position, frlatcli means engageable Witli the free endof said bar and adapted uponopeningmovement oi tlie. bar to jhold saidbar in openposition,

'and means bcooperable Witlisaid bar to initlate the downward swingingmovement.

'of the saine to its closed position, said ymeans comprising,` a camengageable' with said bar intermediate 'its ends, a slidable membercarryingsaid cam, a trip member4 engageable With said sli'dable'mernberto actuate the latter, said trip beingv in -tlie path of inoveinent ofsaid elevator only` when the bar is in its raised open position,

gageable with they bar in its raisedV position to urge thesame towardits closed position,

a cushioning member connected to saidV bar to retard fand cushion tliefall of tlie'same, and means rictionally.engageable with the Jfreeend'of said bar after la predetermined part oits fall, to v"retard theremainder of said fall in conjunction with the retarding member.

by said cushioning ADoLPH HUBER. y

